.quiz-option.selected{border-color:#667eea;background:#e8eaf6}.quiz-result.danger{background:#f8d7da;color:#721c24;border-left-color:#dc3545}.quiz-result.warning{background:#fff3cd;color:#856404;border-left-color:#ffc107}.symptom-option.active{background:#fa709a;color:white;border-color:white}.flip-card.flipped{background:#4facfe;color:white}.flip-card.flipped .flip-card-front{display:none}.flip-card.flipped .flip-card-back{display:block}.progress-step.completed{background:#28a745;color:white;border-color:white}